– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 4 pm Wed 21 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Wed 21 Oct Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryMostly dry. Very mild (max 18°C on Wed afternoon, min 5°C on Fri morning). Wind will be generally light. | Days 5–7 Weather SummaryMostly dry. Very mild (max 15°C on Mon afternoon, min 8°C on Sun night). Wind will be generally light. | ||||||||||||||||
Wed 21 | Thursday 22 | Friday 23 | Saturday 24 | Sunday 25 | Monday 26 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  | | |  |  | |  | | | | | | | |
clear | some clouds | cloudy | light rain | rain shwrs | clear | clear | clear | some clouds | cloudy | light rain | light rain | some clouds | some clouds | clear | clear | clear | |
Cloud base (m) | 8700 | 6700 | 6600 | 1950 | 1600 | 1800 | 6550 | 2500 | 3000 | 2850 | 4800 | 4300 | 6900 | ||||
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | 0.1 | 0.1 | — | — | — | — | — | 0.3 | 0.1 | — | — | — | — | — |
max °C | 18 | 14 | 12 | 12 | 8 | 9 | 11 | 7 | 10 | 11 | 10 | 12 | 14 | 10 | 13 | 15 | 11 |
min °C | 16 | 12 | 11 | 10 | 6 | 5 | 10 | 6 | 6 | 10 | 9 | 10 | 12 | 8 | 8 | 14 | 10 |
chill °C | 16 | 12 | 11 | 10 | 6 | 5 | 10 | 6 | 6 | 10 | 9 | 10 | 12 | 8 | 8 | 14 | 10 |
Freezing level m | 3000 | 2900 | 2500 | 2200 | 1850 | 1850 | 2150 | 2000 | 2300 | 2450 | 2550 | 2650 | 2700 | 2650 | 2750 | 2950 | 3300 |
 | — | — | 7:37 | — | — | 7:39 | — | — | 7:41 | — | — | 7:43 | — | — | 7:43 | — | — |
 | 6:07 | — | — | 6:05 | — | — | 6:02 | — | — | 6:01 | — | — | 6:00 | — | — | 5:58 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mostly dry. Very mild (max 18°C on Wed afternoon, min 5°C on Fri morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mostly dry. Very mild (max 15°C on Mon afternoon, min 8°C on Sun night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table.For a wider overview of the weather, consult the Weather Map of Washington.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
|---|---|---|---|---|---|
 | |||||
Bellingham Airport | | ||||
* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.